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Tropomyosin is a two-stranded alpha-helical, coiled coil protein found in many animal and fungal cells. In animals, it is an important component of the muscular system which works in conjunction with troponin to regulate muscle contraction.
Tropomyosin alpha-1 chain is a protein that in humans is encoded by the TPM1 gene. [5] This gene is a member of the tropomyosin (Tm) family of highly conserved, widely distributed actin-binding proteins involved in the contractile system of striated and smooth muscles and the cytoskeleton of non-muscle cells.
A decrease in β-tropomyosin in patients with heart failure was demonstrated, as failing ventricles expressed solely α-tropomyosin. [19]Heterozygous mutations in TPM2 have been identified in patients with congenital cap myopathy, a rare disorder defined by cap-like structures in muscle fiber periphery.
TnT is a tropomyosin-binding subunit which regulates the interaction of troponin complex with thin filaments; TnI inhibits ATP-ase activity of acto-myosin; TnC is a Ca 2+-binding subunit, playing the main role in Ca 2+ dependent regulation of muscle contraction. [10]
Tropomyosin alpha-3 chain is a protein that in humans is encoded by the TPM3 gene. [ 5 ] [ 6 ] This gene encodes a member of the tropomyosin family of actin-binding proteins involved in the contractile system of striated and smooth muscles and the cytoskeleton of non-muscle cells.
“Cicadas, like other insects, share similar proteins with shellfish, such as tropomyosin, which is a common allergen,” explains Rustveld. “This can cause cross-reactivity, ...
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